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푸아송 분포를 이용한 해상교통관제 구역 내 선박 상호간 교통위험 상황의 발생 간격 분석에 관한 연구
박상원,박영수,Park, Sang-Won,Park, Young-Soo 해양환경안전학회 2016 해양환경안전학회지 Vol.22 No.5
항만 및 연안의 관제구역 내에서는 VHF를 이용하여 24시간 해상교통관제가 이루어지고 있다. 그러므로 VHF 교신을 분석하면 관제구역 내의 선박 움직임이나 관제사의 관제패턴을 확인할 수 있다. 따라서 본 연구에서는 VHF 교신분석으로 관제사가 관제구역 내 위험상황을 관제하는 간격을 도출하고 관제 가이드라인 및 위험한 상황을 사전에 대비할 수 있는 기초 자료로 제공하고자 한다. 이를 위하여 부산항을 대상으로 7일간 VHF 교신을 청취하고, VTS가 직간접적으로 관제한 선박에 대하여 Park 모델을 이용하여 위험도를 도출하였다. 이를 이용하여 단위시간당 일정 위험도 이상의 선박을 관제하는 빈도확률이 푸아송 분포를 따르고 있음을 확인하였고, 그 결과 VTS가 선박을 직접 관제에 개입할 경우는 3.50시간마다, 특히 주간시간대의 경우 2.85시간마다 관제하는 것으로 분석되었다. 그리고 3.84시간마다 일정 위험도 이상의 선박간의 교신이 있음을 확인하였다. Vessel traffic servies (VTS) control movements in ports and coastal areas 24 hours a day using VHF. Thus, we were able to check ship movements and the patterns followed by VTS officers in VTS areas using VHF communication analysis. This study is intended to identify control intervals for dangerous situations and provide VTS officers with basic data and guidelines to prevent these occurrences in advance. We listened to Busan port's VHF communication for seven days and obtained risk values using the Park model with reference to controlled ships. The probability of a dangerous situation arising under a controller's watch per unit of time was confirmed to follow a Poisson distribution. As a result, for each 3.50 hours that VTS directly controls an area, (and in daytime for each 2.85 hours) a ship communicates in a VTS area every 3.84 hours, and some of there communications exceed certain risk values in VTS areas.
미소 전류 자극이 TPS-IMZ 임프란트 주위의 골유착과 골형성에 미치는 영향
박상원,양홍서,Park, Sang-Won,Yang, Hong-So 대한치과보철학회 1996 대한치과보철학회지 Vol.34 No.4
The purpose of this study is to investigate the effect of constant direct current electrical stimulation in healing the bone defects and surrounding tissues of the endo-oseous(TPS-IMZ) implants. Implants were inserted in the femur of adult dogs. Then a constrant direct current of approximately $10{\mu}A$ was applied. Artificial bone defects were prepared on one side of the implant site. Experimental groups were divided into 4 : control group : bone defect without treatment group I : bone defect filled with hydroxyapatite powders group II : bone defect, in which a negative and positive electrodes were inserted 5mm apart from both sides of the implant group III : bone defect, in which negative current was directly connected to the IMZ implant and a positive electrode was placed 10mm apart from the implant The animals were sacrificed in the 1st, 2nd, 4th and 8th week after implantation for the light microscopic examination. The results obtained were as follows : 1. In electrically stimulated experimental groups, new bone formation and osseointegration around implants were accelerated. 2. Group III showed the greatest activity in new bone formation. Osteoconductivity around HA particles was observed in group 1. 3. The defect area of the control group was healed by forming new bone, which grew from the underlying cancellous bone. The defect areas of the electrically stimulated experimental groups were healed by newly formed bone, which grew upward from the cancellous bone and downward from the periosteum. 4. 8 weeks after implantation, all the groups showed good osseointegration between the surrounding bone and implants.
와송약침액(瓦松藥鍼液)이 신장세포(腎臟細胞)에서 H<sub>2</sub>O<sub>2</sub>에 의한 세포사망(細胞死亡) 및 DNA 손상(損傷)에 미치는 영향(影響)
박상원,송춘호,Park, Sang-Won,Song, Choon-Ho 대한침구의학회 2001 대한침구의학회지 Vol.17 No.4
Objectives : This study was performed to determine if Orostachys japonicus A. Berger aquacupuncture (OjB) provides the protective effect against the loss of celi viability and DNA damage induced by oxidant in renal proximal tubular cells. Methods : The cell viability was evaluated by a MTT reduction assay and DNA damage was estimated by measuring double stranded DNA breaks in opossum kidney (OK) cells, an established proximal tubular cell line. Lipid peroxidation was determined by measuring malondialdehyde (MDA), a product of lipid peroxidation. Results : $H_2O_2$ increased the loss of cell viability in a time-dependent manner, which were prevented by 0.1% OjB. The protective effect of OjB was dose-dependent over concentration range of 0.05-0.5%. $H_2O_2$ caused ATP depletion and DNA damage, which were prevented by OjB and the hydrogen peroxide scavenger catalase. The loss of cell viability by $H_2O_2$ was not affected by the antioxidant DPPD, but lipid peroxidation by the oxidant was completely inhibited by DPPD. Conclusions : These data suggest that $H_2O_2$-induced death results from a lipid peroxidation-independent mechanism and the protective effect of OjB is not associated with its antioxidant activity.
우울증(憂鬱症)의 구치료(灸治療)에 관(關)한 문헌적(文獻的) 고찰(考察)
박상원,송춘호,Park Sang-Won,Song Choon-Ho 경락경혈학회 2002 Korean Journal of Acupuncture Vol.19 No.1
Objective : This study was undertaken to review the moxa treatment of melancholia. Method : We referred to records from ancient to modern. Results : The results of this study were obtained as follows ; 1. It reveals that the common symptoms of melancholia shows chronic weakness and coldness generally, and moxibustion is effective for making body warm. 2. It reveals that HT8(少府), LR1(大敦), PC7(大陵), ST36(足三里) are used much for the treatment of melancholia, and the common characters of the above points are freshing mind, refreshing chest, controlling digestive energy etc. 3. It reveals that pericardium meridian, liver meridian, heart meridian are used much in moxa treatment of melancholia. Conclusion : These results indicate that moxa treatment is effective to treatment of melancholia.